chore: Switch to the TCK main branch for 1.0 (#646)

Signed-off-by: Jeff Mesnil <jmesnil@ibm.com>

Author: jmesnil

.github/workflows/run-tck.yml

@@ -11,9 +11,8 @@ on:
   workflow_dispatch:
 
 env:
-  # TODO this is currently running the TCK off the main branch which included changes needed for 0.4.0
   # Tag/branch of the TCK
-  TCK_VERSION: spec_1.0
+  TCK_VERSION: main
   # Tell the TCK runner to report failure if the quality tests fail
   A2A_TCK_FAIL_ON_QUALITY: 1
   # Tell the TCK runner to report failure if the features tests fail